Hi all, I picked up a Parker 45 at an antiques store last year and wondering if anybody has ideas about the era / any other distinguishing features.

I am guessing it's pre-1970s because it has the inverted conical clip screw: image. It's unclear to me, though, if they made these sorts of steel cap / gold clip / plastic body hybrids (e.g. as a variant of the 45 Classic), or if I bought a franken45 with a flighter cap.

In any case, I don't really care because the pen works great! Medium nib, smooth as butter, and I like how it looks. But this is my first vintage pen foray and I'd be interested to know more about it's history!

More images here if helpful (edit:figured out how to get them to display in line!)